Safety tire-tester



EDWARD W. PHILLIrsQoE DE'LTA, oHIo. i' j SAFETY Tian-'LESTER.

Application filed'Mayvl, 19,19. Serial.` No.12977,303.11

To all whom it may concern:

Be it known that 1, EDWARD `W. Pi-I ILLIPS,

a citizen ofthe United States, residing at Delta, in the county of Fulton, State of Ohio, have invented i a new and luseful Safety Tire-Tester; and I do hereby declare the following to be a full, clear, and exactv description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same' The present invention relates to a blowoff valve for tire inflation tubes,, and has for its object to provide a device of this character which embodies novel features .of construction whereby the valve will automatically'open and relieve the pressure when a `predetermined pressure has been built up withinV the tire, thereby preventing over infiation of the tire and signaling to .the operator when the proper degree of inflation has'been reached. Y

,Furtheif objectsof the invention are toV provide a device of this character which is comparatively siinple and inexpensive in its construction, wliich can be readily adjusted to blow out at different pressures, and which will enable the air pressure to be quickly and accurately built up withiii a tire without the necessity of detaching the inflation tube or. pipe from the tire valve and applying Va separate pressure gage thereto at intervals of time. o

lVith these and other objects in View, the

invention consists in certain' novel coinbinations and arrangements of the parts as will inore fully appear as the description proceeds, ltlie novel features thereof being pointedout in the appended claims., p v

For a full understanding of the invention, reference ,is to be had to the following description andaccompanying drawings, in which:- v

Figure-1 is a side-elevation of ablow-off valve construction which einbodies the invention.

Fig. 2 is a longitudinal sectionalfview through the same.

Fig. 3 is a transverse Sectional view on the line 3-3 of Fig. 1. i

Fig. 4 is a similar View onthel line 4 4 of Fig. 1.

Fig. 5 is a similar View on the line 5-5 of' Fig. 2, the valve being shown byfull lines iii a closed position, and by dotted lines 'in aii open position.

Ooi-responding and like parts are referred- Specfic atioi of LettersPatent.:

v atente'a nee. 25, 1919.

in all the viewsjof thedrawings by the same reference characters.

Vspecifically describing the .presentienie'ibodiment of the invention, the. numeralpl designates a pipe section which is interposed being formed with a blow-oii" opening 5 in oneside thereof.V A piston or plunger 6 is slidable within the tubular arm 4, vand 'is f to in the following description and indicated operatively connected as' by ineansfof a steni or pin 7. to a leaf spring 8.' This-spring eX- Vtends longitudinally along the-fout'sidef'of the pipe section -1 in a spaced 'andsubstantially parallel relationthereto, the opposite end of the spring being rigidly secured by a-suitable fastening member 9 to a block 10 which is clainped in position upon the pipe.y

section. In the present instance theblock 10 isshown ascarried by a split clamp'ingr ring 11 of which the free vends are connected byla bolt 12.v The'tensio'n of the leaf spring 8 normally moves thepl'unger 6 down-wardly in the-tubular arm 4 and thereby cuts voff communication between the interior of the pipe section and the blow-off 'opening 5,

However, when the .pressure within the pipe sectionA becomes sufficient to-move the plunger 6 outwardly against the action of the leafspring 8 toa point beyond the blow-off opening 5, as indicated by; dottedlines on Fig. 5, the pressure within. the .pipe section will be relieved. Adjustment is made so that the plunger ;is moved oiitwardly a suflicient amount to uncover theblow-off opening.. 5 When the properhpressure has been, biiilt upV within the pneumatictire, therebyj avoiding :overy i nflation vof the tire, Vand avoiding the necessity of repeatedlyV uncoupling the infiation tube from the tire vvalve and applying a separate' gage thereto for the purposeof ascertaining the` pressure f withinV the tire.

The leaf spring extends through .a-

lateral opening 13 in a tubular bracket 14 which is carried by a slide 15, said slide being adjustable longitudinally upon the pipe section V1, and being provided with a clamp ing bolt 16,"by means of which Vit can Vbe held rgidly in an adjusted position. A., cap

upper end thereof ;-is provided with a head orfinger piece 19: lt vvfill'v be obvious that 'this screw l8fcan be'inanipulatedtovary Y the distancethe plunger G'inustjtravel outwardly. 'againstthe'springpreSsure to uiicoyerj thel port 5, thereby 'enabling adjustment to-fbe made for-causingsthe port to'be "openedfat different .pressuresV Theh'ead 19 of the screw f is shown-*asprovided with a I pointer '20 :which coperates Vwith graduatonsl lto indicate the :pressure Iwhich' will' be'huiltupwithin the pneumatictire before the blow-off va'lve isbrought into operation tofre'hevelthe ;pressuret It will 'be obvious that ther'efeet ofthe adjusting screw' 18 upon the acti'onofthe leaf spring 8 willv clepend to` or a "considerable extentfupon the*v point atfwhich theleaf spring is engaged by. itheg'fadjusting screw; The slide 15 is Vmovable upon the pipe'sectioni-so that adjustnf'ient can. *be fmade for this purpose, and

Letters Patent, is i;V

the; said?pipe'secti'on 'is-shown as provided, withgraduations 22 which enable'athe slide to vbegsetwlth; accuracy at an'y'desired posi- I tion:

Having thus described' the invention,

what I claim as newv and desire to secure by "1:, A blow-jeff valve v for tire, infiation mtubes,V includin'gapipe section formed with la tub-ular 'arin-projecting 'laterall'y therefrom, a plunger slidab'le 'in thetubular. arm, i? a leaf spring extending along the'gexterior of-the pipe section'and having` one end;

thereof connected'to tlielplunger, a block 7 Iapplied to ;theft-pipe section and lhavingthe V'other end of theJ leafspringfsecured thereto, :fan'fadjusting screw m'oi'nted 'forengagenien't withan intermediate portiony ofthe 'leafspring, cand'jsupporting' means `f c'jrth'e adjusting's'crewf p.: p V@jAn--blow-offvalve for tire inflato'n tubes, including 'aj pipe section formed -withj Vatubular arin' projecting'ilaterallyi there* from, ca o plunger VIs'lida'bl'e in the tubiilar arm, a le'af spring 'extending Aal'o1`ri`g exterior of thepipesection an'djhavng the"p'*lunger lconi'iected vftoone end thereof, 'meansfforr lmentsf ofthe slide enablingthe' screw'j'to be .adjustedgto Vengagethe' spring at different V'points'in the length thereof.

securing the` other; end ofthe leafV spring to-the pipesection, a slide mounted upon the pipe section, 'a' bracket carried by the slide,-and an adjusting screw carried by the vbracket and .adapted to engage an intermediate portion of the'leaf spring, 'the move- 3. A blow-offV valve''- 'for ftire inflation tubes`,inclu:ling a pipe vsection Vformed with a tubular" arni projecting laterally Vtherefrom, 'a plunger slidable' in the "tubu'lar arm, la vleaf spring :extending along the exterior of the' pipe section and having the plunger connected to one -end. th'ereo`f, a 'block' projecting from the pipe section 'and having the other .end of the leaf spring secured thereto,'a tubular bracket projecting from the pipe .section an'dformed with a lateral opening` through vwhich-the leaf 'spring'eX-; tends, ?a cap applied to-the outer endl of thev tubular bracket, an adjusting screw threaded in the'cap and adapted to 4'engage the 'leaf spring, and indicatingV means associated with 'the' adjusting screw. 'I

41 'A 1 blow-off v'valve for -tire infiation tubes,l including a pipe'se'ction formed with a tubular 'arm 'projecting laterally' therefrom and provided with graduations, a Y

plunger slidable in theV tubular arm,,a`v leaf spri''ig extending along thefeX'te'rior ofthe ,pipe section' and havingith'e plunger con- Ane'cted'to on'ee'nd thereof,-a block-appliedfto. the pipev section andl having the otherfend' of theleaf lspring connected thereto, a slide mounted 'upon-the pipe section and 1 accuramly-adjustable there'on by means of the before mentioned lgpcaduations, a' bracket arm projecting from the slide, an 'adjusting screw carried by the bracket arm and adapted'to engagefthe leaf spring, vandl indieating means fe tss'ooiatedflwit'hv the adjusting screw o 'for 'enabling an accurate adjustmentv to be' obtained. i i 'I "-In testimony whereof Ir'liave .signed ofy ltwo subscribing 'witnesses name to :this :specificationin j the presence `,VVitne'sses a a; T Mcoona fnnwnnnw. Vrnitiiiiesl 1 i 

